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    <meta charset="UTF-8">
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>

        var a=prompt('身高')
        var b=prompt('体重')
        if((a-108)*2==b-10){
            console.log('瘦')
        }else if((a-108)*2==b+10){
            console.log('胖')
        }else{
            console.log('匀称')
        }

    </script>
</body>
</html>